H.I.G. Capital has sold AVI-SPL, a provider of audiovisual and video conferencing services, to Marlin Equity Partners. AVI-SPL is a provider of enterprise-class audiovisual (AV) and video conferencing (VC) services. The Tampa-based company, led by CEO John Zettel, is active in the design, procurement, engineering, integration, installation, and servicing of AV and VC systems for…...